From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexander Dahl <ada@thorsis.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: [PATCH 00/12] clocksource: improve Atmel TCB timer driver
Date: Wed, 3 Apr 2019 16:11:08 +0200 [thread overview]
Message-ID: <20190403141120.32754-1-alexandre.belloni@bootlin.com> (raw)
Hi,
This series immproves the Atmel TCB clocksource driver to address the
most urgent shortcomings:
- the current tcb_clksrc driver is probed too late to be able to be used at
boot and we now have SoCs that don't have a PIT. They currently are not able
to boot an upstream kernel.
- using the PIT doesn't work well with preempt-rt because its interrupt is
shared (in particular with the UART) and their interrupt flags are
incompatible). This also happen with the threadedirq command line
switch.
- there is currently no high resolution sched_clock.
The plan is to get those changes upstream as soon as possible as they
arre fixing real issues that people are facing. There are further
changes needed on the clocksource driver to try to stop wasting a TCB
channel.
the PWM TCB driver will also be changed to actually used the reviewed
binding and this will allow to get rif of atmel_tclib.
Alexandre Belloni (12):
ARM: at91: move SoC specific definitions to SoC folder
misc: atmel_tclib: drop AVR32 support
misc: atmel_tclib: move definitions to header file
clocksource/drivers/tcb_clksrc: stop depending on atmel_tclib
clocksource/drivers/tcb_clksrc: Use tcb as sched_clock
ARM: at91: Implement clocksource selection
clocksource/drivers/tcb_clksrc: move Kconfig option
clocksource/drivers/timer-atmel-pit: rework Kconfig option
clocksource/drivers/tcb_clksrc: Rename the file for consistency
ARM: configs: at91: unselect PIT
misc: atmel_tclib: do not probe already used TCBs
clocksource/drivers/timer-atmel-tcb: Use ARRAY_SIZE instead of
hardcoded size
arch/arm/configs/at91_dt_defconfig | 1 +
arch/arm/configs/sama5_defconfig | 1 +
arch/arm/mach-at91/Kconfig | 23 ++++
drivers/clocksource/Kconfig | 12 +-
drivers/clocksource/Makefile | 2 +-
.../{tcb_clksrc.c => timer-atmel-tcb.c} | 123 ++++++++++++------
drivers/misc/Kconfig | 24 ----
drivers/misc/atmel_tclib.c | 37 +-----
drivers/pwm/pwm-atmel-tcb.c | 2 +-
.../atmel_tc.h => soc/at91/atmel_tcb.h} | 25 +++-
10 files changed, 146 insertions(+), 104 deletions(-)
rename drivers/clocksource/{tcb_clksrc.c => timer-atmel-tcb.c} (81%)
rename include/{linux/atmel_tc.h => soc/at91/atmel_tcb.h} (95%)
--
2.20.1
next reply other threads:[~2019-04-03 14:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 14:11 Alexandre Belloni [this message]
2019-04-03 14:11 ` [PATCH 01/12] ARM: at91: move SoC specific definitions to SoC folder Alexandre Belloni
2019-04-03 14:36 ` Thierry Reding
2019-04-03 17:36 ` Arnd Bergmann
2019-04-03 14:11 ` [PATCH 02/12] misc: atmel_tclib: drop AVR32 support Alexandre Belloni
2019-04-03 14:11 ` [PATCH 03/12] misc: atmel_tclib: move definitions to header file Alexandre Belloni
2019-04-11 15:00 ` Daniel Lezcano
2019-04-15 14:22 ` Alexandre Belloni
2019-04-03 14:11 ` [PATCH 04/12] clocksource/drivers/tcb_clksrc: stop depending on atmel_tclib Alexandre Belloni
2019-04-11 16:19 ` Daniel Lezcano
2019-04-15 14:14 ` Alexandre Belloni
2019-04-03 14:11 ` [PATCH 05/12] clocksource/drivers/tcb_clksrc: Use tcb as sched_clock Alexandre Belloni
2019-04-03 14:11 ` [PATCH 06/12] ARM: at91: Implement clocksource selection Alexandre Belloni
2019-04-03 14:11 ` [PATCH 07/12] clocksource/drivers/tcb_clksrc: move Kconfig option Alexandre Belloni
2019-04-03 14:11 ` [PATCH 08/12] clocksource/drivers/timer-atmel-pit: rework " Alexandre Belloni
2019-04-03 14:11 ` [PATCH 09/12] clocksource/drivers/tcb_clksrc: Rename the file for consistency Alexandre Belloni
2019-04-03 14:11 ` [PATCH 10/12] ARM: configs: at91: unselect PIT Alexandre Belloni
2019-04-03 14:11 ` [PATCH 11/12] misc: atmel_tclib: do not probe already used TCBs Alexandre Belloni
2019-04-25 20:18 ` Greg Kroah-Hartman
2019-04-03 14:11 ` [PATCH 12/12] clocksource/drivers/timer-atmel-tcb: Use ARRAY_SIZE instead of hardcoded size Alexandre Belloni
2019-04-11 16:34 ` [PATCH 00/12] clocksource: improve Atmel TCB timer driver Daniel Lezcano
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